Importance

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Abstract

A HVAC diagnostic system and method is disclosed which permits bypassing the normal operation of a thermostat by HVAC service personnel, typically permitting the HVAC service personnel control over thermostat functionality while servicing the condenser coils and/or compressor located external to customer building. The present invention is useful in situations where HVAC service calls must be scheduled at customer premises such as homes, apartments, etc., during normal hours where the occupants are not typically available to permit access to the thermostat within the building structure. By permitting override of the customer thermostat at the compressor/condenser unit, the system permits servicing of this unit without customer assistance. As such, HVAC service can be completed on a more regular schedule, saving substantial energy and providing improved customer environmental comfort.

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First Claim